I assume it's a reference to https://developer.thunderbird.net/planning/roadmap#firefox-sync https://developer.thunderbird.net/planning/roadmap#firefox-s... Ba

I assume it's a reference to https://developer.thunderbird.net/planning/roadmap#firefox-sync https://developer.thunderbird.net/planning/roadmap#firefox-s... Basically, Firefox Sync allows you to sync certain things across your devices (bookmarks, tabs, etc) and they are going to implement similar functionality in Thunderbird.